Even though the high-end Navi GPU is supposed to launch this summer, engineering samples appear to already be tested in the wild. The alleged high-end Navi model that popped in cyubeVR OpenVR benchmark, for example, is 17% faster than Nvidia's RTX 2080 Ti, and performance could slightly improve for the commercial version.
https://www.notebookcheck.net/AMD-s-high-end-Navi-GPU-allegedly-pops-up-in-OpenVR-benchmark-outperforms-Nvidia-s-RTX-2080-Ti.449872.0.html